This article aims at describing the rationale and principles of designing English teaching
materials for teachers of non-English subjects. Those teachers use English as a medium of
instruction. English is used to teach the subjects. To improve the teachers' English skills, the
school provided an English course. However, the teaching materials for those specific
learners were not available. Therefore, designing materials is needed to precisely fulfil their
needs of English in the target professional workplace. A needs analysis was conducted to …